Needle-threader for sewing-machines.



No. 726,083, I P'ATBNTBD APR. 21; 1903i K H. 13. MMzNlzmD.I Y Y NEEDLE THREADBR POB SEWING MACIrIINES.`

APgLI'oATIoN IILILDv mums, 1902.` lo Ionm.. f

UNLTED PATENT iCFFICE. f

HAROLDB. MAYNARD, or BROOKLYN, Nnw YORK, AssIGNOR To' IifnsELF ANDIIVY HAwns, or BROOKLYN, NEWYORK.

NEEDLE-T'HREADER FOR SEWING-MACHINES.

SPEGIFICATION forming part of Letters Patent Nr'o. 726,083, dated April 21, 1903. Application led June 12, 1902. Serial No. 111,259. (No model.)

Be it known that I, HAROLD B. MAYNARD,

a citizen of the United States, residing in the borough of Brooklyn, in thecoun'ty of Kings, city and State of New York, have invented an Improvement in Needle-Threader Attachments for SewingfMachines, of which the following is a specification.

My invention relatesto attachments to the needle-bar ofia sewing-machinefhy means of which the needle can hereadily threaded without any special care or effort-On the part ofthe operator and which device after use can he turned up ont of the way of `theurnoveinents of the needle. I provide a device for engaging the needle-bar ot' the sewing-machine and a rocker-bar supported by said device, the ends of which are preferably threaded and provided with perforations and nuts. Ayokeframe, preferably formed of wire, is received in the perforations-ot' said rocker-bar and is clamped by said nuts, and this yoke-frameis provided with a foot-piece at right angles to the main depending or vertical portion of said yoke-frame, and this foot-piece is formed at the bend of the wire constituting the frame, and it serves as a point of attachment for a conical guide, that is divided and provided with curved meeting edges.

The device engaging the needle-bar I prefer to comprise a clip surrounding the bar and having a clamping-screw and a bracket eXtension connected therewith for supportingU the rocker-bar; but the precise'construction of the device is controlled by the shape of the needle-bar. The upright members of the yoke-frame are separated appreciabl'y and 'at a, distance which substantially agrees with the thickness of the sewing-machine needle, so that when the parts are in' the" threading position the needle is received between these parts of the frame, and said frame is to he adjusted when first placed uponthe machine so that the smallV aperture in the conical guide comes directly opposite to the eye of 'the nee v` die, and when the parte are in this-position the thread passed through the guide also passes through the eye ofthe 'n'eedle with the further movement thereof. The divided feature of the conical guide provides for the escape or the passing out of theguide of the thread when the yoke-frame is turned from a depending operating position to an elevated position, where the same is temporarily out of use.

In the drawings, Figure 1 is a sectional side elevation representing my improvement. Fig. 2 is a front elevation that is at right angles to Figui. Fig. 3 is' a sectional plap at cx of Fig. l. v4Fig. 4-

a sectional plan at 'y y of 6o Fig.2, andl Fig.,5 is asec'tional plan representing a modification onapproXimately the line a; 02 of'ligfl.

The band a andl clainpscrew l form a clip device for engagingthe needle-bar b. This bar h is of circular Yform in cross-section, and therefore the band a conforms thereto. c represents a bracket extension in the form of a bent plate of metal secured to the band a by a screw. The free ends of the bracket ex- 7o tension o are perforated toreceive a rockerbar d. This bar CZ is provided with threaded ends andadrjacent perforations 2 3, and nuts 4 5 screw upon the' threaded ends.

I providea frame e, of wire, generally in the form of a yoke and having a foot-piece e, formed by the bend of the wire, which footpiece is at right angles to the yoke-shaped portions ofthe frame, while the upper p0rtions are bent at right angles first in one di- 8o rection and then in the other direction at the extremeelnds ofthe frame, and these extreme ends pass through the perforations 2 3 of the rocker-bar d,"and the nuts 4 5 bear against these ends ot'` theyoke-frlame e and force the 85 same against vtlieol'iter faces of the bracket extensionc In this manner the yoke-frame is firmly an'drigidly held to the rocker-bar, and sufficient vfriction is thus produced to maintain' the yoke-frame in any position in 9o which the same'may be placed. This structure also provides for an adjustability of the yoke-frame vertically in its relation to the rocker-bar d, because by simply loosening the nuts 4c 5 the free ends of the yoke-frame may 95 be moved in the perforations of 'the rockerlbarto a limited extent which is sufticient, lhowever, to provide for slight differences in the lengths of sewing.- machineneedles, so that when the attaching device is once conroo nected to the needle-bar this part need not be shifted, the adjustment being effected by moving the yoke-frame e.

Secured to the foot-piece e' of the yokeframe is a conical guidef, of sheet metal, the edges of which are curved and brought around in forming the conical guide, so that they approximately meet. The end of the conical guide of smallest aperture is placed next to the uprights of the yoke-frame and the end of largest aperture at the free end of the footpiece--or, in other words, at the bend of the wire forming the yoke-frame.

From Figs. 2 and 4 it will be noticed that there are parts of the yoke-frame extending from the foot-piece e upward thatare approximately parallel and that occupy an adjacent position to one another, the same being separated to an extent about equal to the thickness of the sewing-machine needle, so that when the yoke-frame is in a depending position,`as shown in Figs. l and 2 by full lines, the sewing-machine needle comes between the parts thereof and against the small apertured end of the conical guide. The thread to be passed through the eye of the needle is straightened by the fingers and passed into and through the conical guide, and as the same emerges from the small apertured end the thread passes directly through the eye of the needle owing to the accuracy of adjustment and the relation of the parts.

The dotted line g, Fig. l, represents the thread as having been passed through the guide and the needle, and in Fig. l the yokeframe is shown by dotted lines in its elevated position, where the sameis out of use. The object of'dividing the conical guide is to provide an escape or means for the removal of the thread from the guide when the yoke.

frame is turned up into its elevated position, as otherwise the thread could not escape. In this movement the thread passes between the curved meeting edges of the conical gnide and slightly forces the same apart as it passes through.

In the modification, Fig. 5, I have represented the needle-bar b of the sewing-machine as of rectangular form in cross-section, and because some of the needle-bars of sewing-machines are of this form it is necessary that a device be provided adapted for connection therewith to support the main features of the needle-threader attachment. In connection with this needle-bar of rectangular form I provide a bracket c', passing around three sides of said needle-bar and receiving the stem of a clamping-nut G,the same passing through the needle-bar and bracket, with thenut of the clamping device bearing against the bracket to hold the same to the rectangular needle-bar. This bracket c' is adapted to receive and support the rocker-bar d and other devices going to make up the needlethreader attachment.

This device is exceedingly simple in its construction and is eflicient in operation and after eecting the threading of the needle is readily moved up out of the way, so that it does not interfere with the operations of the needle cr needle-bar in sewing.

I claim as my invention l. A needle-threader attachment for sewing-machines, comprising a clamping device for engaging the needle-bar, a rocker-bar supported thereby and movable therein, a yokeframe having a foot-piece at the bend of the wire forming the same and which foot-piece is at right angles to the main portion, and a divided conical guide having curved meeting edges with the larger apertured end of the conical guide at the bent end of the footpiece and the smaller apertured end set at the junction of the foot-piece With the main part of the yoke-frame, and means for connecting the free ends of the yoke-frame to the rocker-bar adjustably and for securing the same in position, said yoke-frame being adapted to swing with the conical guide in its relation to the clamping device, substantially as set forth.

2. A needle-threader attachment for sewing-machines, comprising a clamping device engaging the needle-bar, a bracket extension secured thereto and carried thereby and havin g apertures at the free ends thereof,a rockerbar passing through the apertures of the bracket extension and having threaded ends and adjacent perforations, and nuts upon the threaded ends of the rocker-bar, and a yokeframe of wire having its free ends received in the perforations of the rocker-bar and secured thereto by said nuts, and a conical guide for the thread connected to and supported by the yoke-frame, substantially as set forth.

3. A needle-threader attachment for sewing-machines, comprising a clamping device engaging the needle-bar, a bracket extension secured thereto and carried thereby and having apertures at the free ends thereof,a rockerbar passing through the apertures of the bracket extension and having threaded ends and adjacent perforations and nuts upon the threaded ends of the rocker-bar, and a frame of wire having a foot-piece at the bent portion of the wire which is at right angles to the main portion, and a main portion where the wires are in part parallel to one another and in part diverging as a yoke with the ends of the wire bent at right angles to the yoke portion and again at right angles into short ends and the short ends passed through the perforations of the rocker-bar and held adjustably therein by the nuts, and a conical guide formed of bent-up sheet metal divided and having curved meeting edges with the small apertured ends of the conical guide set up to and at the spaced-apart parallel portions of the frame secured to the foot-piece, and with the large apertured end at the bend of the wire and free end of the foot-piece, substantially as set forth.

Signed by me this 10th day of June, 1902.

HAROLD B. MAYNARD.

Witnesses:

GEO. T. PINCKNEY, S. T. HAVILAND.

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